How to machine plane Cupping on timber boards
Woodworking machinery used: Planner Thicknesser
This can be done in a similar way to bowing and winding using the thicknesser, with the support this time holding the board up length ways.
An alternative that seems to work is:
1. With the convex side up, take gentle passes through the thicknesser until a strip approximately half the full width is flattened.
2. Now flip it over so the concave side is facing up and do the same.
3. From here until you have the right thickness keep on flipping it over.
By flipping it once you have a flat area, the problem of the thicknesser rollers pressing it flat is reduced.
That covers the basics, any compound problems can be tackled with combinations of the techniques. Use accurately set woodworking machinery in combination with simple flat straight jigs.
If you fancy a practice job, try making a “Jenga” set, see what difference it makes to the stability of towers when you change the moisture content.
Timber / wood for DIY, Woodworking, Joinery, Carpentry
Examples of joinery jobs, softwood types and timber grades
Carpentry and joinery softwood types
Timber Grades, Unsorted ? Vth's ? Sawfalling ?
Timber rough sawn ? PSE ? PAR?
Commonly available rough sawn and PSE / PAR timber sizes
How to choose a Timber Merchant / Supplier
Work out what timber you need for the job
Inspecting wood at the Timber Merchant
Preparing the timber for acclimatising
Planing timber / wood flat, square and true
How to plane up the good pieces of wood
How to plane Winding or Twisted timber
How to plane bowing on a timber board
How to plane cupped or cupping timber